Thorne Research
Theanine
88/100
SUPPIE SCORE
82/100
EFFICACY
High
SAFETY
92/100
CLEANLINESS
What Does Theanine Do?
Thorne L-Theanine offers a research-backed 200mg dose for effective stress relief, relaxation, and focus support with strong evidence from RCTs. The formulation is clean and safe, with low-risk excipients and no allergens, ideal for daily use in healthy adults.
How does L-Theanine promote relaxation without causing drowsiness?
What is the evidence for L-Theanine's effects on sleep quality?
Can L-Theanine help with focus and cognitive performance during stress?
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What Are the Benefits of Theanine?
Based on proven scientific research
Stress ReductionStrong
RelaxationStrong
Improved FocusModerate
Better Sleep QualityModerate
Mood SupportModerate
Good For:
What Are the Side Effects of Thorne Research Theanine?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•L-Theanine at 200mg is well within safe daily limits (up to 900mg for 8 weeks), with GRAS status and minimal side effects reported in clinical studies.
•Mild side effects like headache or drowsiness may occur rarely; no serious adverse events linked to this formulation.
•No known significant drug interactions for L-Theanine in this product; consult physician if on sedatives or stimulants.
•Safe for healthy adults; contraindicated in hypersensitivity to ingredients; pregnancy requires medical consultation.
•Inactive ingredients (hypromellose, cellulose, leucine, calcium laurate) are low-risk excipients with no allergenicity in this gluten/dairy/soy-free product.
•Thorne's manufacturing ensures low contamination risk; suitable for long-term use at recommended doses.
Potential Side Effects
Negative Interactions
Inactive Ingredients
Calcium laurate
Low RiskHypromellose
Low RiskLeucine
Low RiskMicrocrystalline cellulose
Low RiskWhat Are the Ingredients in Thorne Research Theanine?
L-Theanine
200mg
Calcium Laurate
Hypromellose
Leucine
Microcrystalline Cellulose
Scan the bottle in your cupboard
Same graded report you just read — on any label, in about 10 seconds.
Dosage & Bioavailability
How the active doses and forms in Theanine compare to the research.
•L-Theanine — 200 mg per serving; within the 200-400 mg/day used in studies.
Sources & References
Theanine 200
Information from www.smeetsengraas.nl
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Dp
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PMC11811612
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S1359644621001975
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PMC10997602
Information from pmc.ncbi.nlm.nih.gov
Product
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Fdcc
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L theanine.html
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Information from pmc.ncbi.nlm.nih.gov
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Ltheanine for the foggyheaded distracted kind of
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Calcium laurate
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L theanine
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Theanine.html
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PMC11616108
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Benefits of theanine supplements by thorne research
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PMC6366437
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Information from pmc.ncbi.nlm.nih.gov
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Information from pmc.ncbi.nlm.nih.gov
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PMC11263523
Information from pmc.ncbi.nlm.nih.gov
Thorne theanine
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Dp
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L theanine
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22214254
Information from pubmed.ncbi.nlm.nih.gov
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B0797BLW59
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Calcium Laurate
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Theanine
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Theanine 02.pdf
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Leucine uses benefits side effects dosage 7567617
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PMC9017334
Information from pmc.ncbi.nlm.nih.gov
Article
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Evt 340064
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PMC12609247
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L Theanine
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Article
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Onnit total human review
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PMC12892352
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PMC6836118
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Theanine
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Dp
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PMC7009086
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Information from store.mayoclinic.com
Laurate
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PMC10179891
Information from pmc.ncbi.nlm.nih.gov
PMC3518171
Information from pmc.ncbi.nlm.nih.gov
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Information from www.thorne.com
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PMC11082867
Information from pmc.ncbi.nlm.nih.gov
Frequently Asked Questions
Common questions about Thorne Research Theanine